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(1) 
5.2 ×8=41.6
(2) 
0.2 ×12=2.4
(3) 
2.2 ×0.08=0.176
(18) 
5.3 ×0.03=
时间,
或其:

qquad
(19) 
13 ×0.3=

4.5 ×30=

2.2-1.3=
(4) 
0.13 ×0.7=0.091
(20) 
8.5 ×0.04=

0.9+0.06=
(5) 
11-0.35=
(21) 
3.2-2.9=

0.06 ×2=
(6) 
0.7 ×0.2=
(22) 
2.4 ×0.4=
(39) 
1.2 ×30=
(6) 
0.7 ×0.2=0.14
(23) 
0.9 ×10=
(40) 
26 ×0.05=
(7) 
18 ×0.05=
(24) 
4×0.6=
(41) 
0.24 ×20=
(8) 
0.7 ×1.3=
(25) 
5.05 ×100=
(42) 
2.3 ×0.3=
(9) 
4.08 ×12=
(26) 
3.08 ×0.9=
(43) 
6.04 ×1000=
(11) 
0.35 ×50=
(21) 
7.2 ×0.2=
(44) 
0.42 ×4=
(II) 
1.28 ×2=
(28) 
4.5 ×18=
(45) 
50 ×0.8=
(12) 
1.5 ×4=
(29) 
1.5 ×0.8=
(46) 
19 ×0.02=
(13) 
0.2-0.15=
(30) 
4.1 ×2=
(47) 
2.8 ×0.5=
(14) 
2.5 ×0.4=
(31) 
1.25 ×80=
(48) 
0.02 ×5.5=
(15) 
5.04 ×1.2=
(32) 
1.6 ×0.05=
(49) 
0.1+6.9=
(16) 
0.8 ×0.7=
(33) 
16 ×0.4=
(50) 
16.5 ×4=
(11) 
80 ×0.16=
(34) 
70 ×1.6=

(11) 5.2×8=41.6 5.2 \times 8=41.6 \newline(22) 0.2×12=2.4 0.2 \times 12=2.4 \newline(33) 2.2×0.08=0.176 2.2 \times 0.08=0.176 \newline(1818) 5.3×0.03= 5.3 \times 0.03= \newline时间,\newline或其:\newline \qquad \newline(1919) 13×0.3= 13 \times 0.3= \newline4.5×30= 4.5 \times 30= \newline2.21.3= 2.2-1.3= \newline(44) 0.13×0.7=0.091 0.13 \times 0.7=0.091 \newline(2020) 8.5×0.04= 8.5 \times 0.04= \newline0.2×12=2.4 0.2 \times 12=2.4 00\newline(55) 0.2×12=2.4 0.2 \times 12=2.4 11\newline(2121) 0.2×12=2.4 0.2 \times 12=2.4 22\newline0.2×12=2.4 0.2 \times 12=2.4 33\newline(66) 0.2×12=2.4 0.2 \times 12=2.4 44\newline(2222) 0.2×12=2.4 0.2 \times 12=2.4 55\newline(3939) 0.2×12=2.4 0.2 \times 12=2.4 66\newline(66) 0.2×12=2.4 0.2 \times 12=2.4 77\newline(2323) 0.2×12=2.4 0.2 \times 12=2.4 88\newline(4040) 0.2×12=2.4 0.2 \times 12=2.4 99\newline(77) 2.2×0.08=0.176 2.2 \times 0.08=0.176 00\newline(2424) 2.2×0.08=0.176 2.2 \times 0.08=0.176 11\newline(4141) 2.2×0.08=0.176 2.2 \times 0.08=0.176 22\newline(88) 2.2×0.08=0.176 2.2 \times 0.08=0.176 33\newline(2525) 2.2×0.08=0.176 2.2 \times 0.08=0.176 44\newline(4242) 2.2×0.08=0.176 2.2 \times 0.08=0.176 55\newline(99) 2.2×0.08=0.176 2.2 \times 0.08=0.176 66\newline(2626) 2.2×0.08=0.176 2.2 \times 0.08=0.176 77\newline(4343) 2.2×0.08=0.176 2.2 \times 0.08=0.176 88\newline(1111) 2.2×0.08=0.176 2.2 \times 0.08=0.176 99\newline(2121) 5.3×0.03= 5.3 \times 0.03= 00\newline(4444) 5.3×0.03= 5.3 \times 0.03= 11\newline(II) 5.3×0.03= 5.3 \times 0.03= 22\newline(2828) 5.3×0.03= 5.3 \times 0.03= 33\newline(4545) 5.3×0.03= 5.3 \times 0.03= 44\newline(1212) 5.3×0.03= 5.3 \times 0.03= 55\newline(2929) 5.3×0.03= 5.3 \times 0.03= 66\newline(4646) 5.3×0.03= 5.3 \times 0.03= 77\newline(1313) 5.3×0.03= 5.3 \times 0.03= 88\newline(3030) 5.3×0.03= 5.3 \times 0.03= 99\newline(4747) \qquad 00\newline(1414) \qquad 11\newline(3131) \qquad 22\newline(4848) \qquad 33\newline(1515) \qquad 44\newline(3232) \qquad 55\newline(4949) \qquad 66\newline(1616) \qquad 77\newline(3333) \qquad 88\newline(5050) \qquad 99\newline(1111) 13×0.3= 13 \times 0.3= 00\newline(3434) 13×0.3= 13 \times 0.3= 11

Full solution

Q. (11) 5.2×8=41.6 5.2 \times 8=41.6 \newline(22) 0.2×12=2.4 0.2 \times 12=2.4 \newline(33) 2.2×0.08=0.176 2.2 \times 0.08=0.176 \newline(1818) 5.3×0.03= 5.3 \times 0.03= \newline时间,\newline或其:\newline \qquad \newline(1919) 13×0.3= 13 \times 0.3= \newline4.5×30= 4.5 \times 30= \newline2.21.3= 2.2-1.3= \newline(44) 0.13×0.7=0.091 0.13 \times 0.7=0.091 \newline(2020) 8.5×0.04= 8.5 \times 0.04= \newline0.2×12=2.4 0.2 \times 12=2.4 00\newline(55) 0.2×12=2.4 0.2 \times 12=2.4 11\newline(2121) 0.2×12=2.4 0.2 \times 12=2.4 22\newline0.2×12=2.4 0.2 \times 12=2.4 33\newline(66) 0.2×12=2.4 0.2 \times 12=2.4 44\newline(2222) 0.2×12=2.4 0.2 \times 12=2.4 55\newline(3939) 0.2×12=2.4 0.2 \times 12=2.4 66\newline(66) 0.2×12=2.4 0.2 \times 12=2.4 77\newline(2323) 0.2×12=2.4 0.2 \times 12=2.4 88\newline(4040) 0.2×12=2.4 0.2 \times 12=2.4 99\newline(77) 2.2×0.08=0.176 2.2 \times 0.08=0.176 00\newline(2424) 2.2×0.08=0.176 2.2 \times 0.08=0.176 11\newline(4141) 2.2×0.08=0.176 2.2 \times 0.08=0.176 22\newline(88) 2.2×0.08=0.176 2.2 \times 0.08=0.176 33\newline(2525) 2.2×0.08=0.176 2.2 \times 0.08=0.176 44\newline(4242) 2.2×0.08=0.176 2.2 \times 0.08=0.176 55\newline(99) 2.2×0.08=0.176 2.2 \times 0.08=0.176 66\newline(2626) 2.2×0.08=0.176 2.2 \times 0.08=0.176 77\newline(4343) 2.2×0.08=0.176 2.2 \times 0.08=0.176 88\newline(1111) 2.2×0.08=0.176 2.2 \times 0.08=0.176 99\newline(2121) 5.3×0.03= 5.3 \times 0.03= 00\newline(4444) 5.3×0.03= 5.3 \times 0.03= 11\newline(II) 5.3×0.03= 5.3 \times 0.03= 22\newline(2828) 5.3×0.03= 5.3 \times 0.03= 33\newline(4545) 5.3×0.03= 5.3 \times 0.03= 44\newline(1212) 5.3×0.03= 5.3 \times 0.03= 55\newline(2929) 5.3×0.03= 5.3 \times 0.03= 66\newline(4646) 5.3×0.03= 5.3 \times 0.03= 77\newline(1313) 5.3×0.03= 5.3 \times 0.03= 88\newline(3030) 5.3×0.03= 5.3 \times 0.03= 99\newline(4747) \qquad 00\newline(1414) \qquad 11\newline(3131) \qquad 22\newline(4848) \qquad 33\newline(1515) \qquad 44\newline(3232) \qquad 55\newline(4949) \qquad 66\newline(1616) \qquad 77\newline(3333) \qquad 88\newline(5050) \qquad 99\newline(1111) 13×0.3= 13 \times 0.3= 00\newline(3434) 13×0.3= 13 \times 0.3= 11
  1. Calculate rolls needed: Calculate the number of rolls by dividing the total amount of tape needed by the amount of tape on each roll. 8,000cm÷2,000cm/roll=4rolls8,000 \, \text{cm} \div 2,000 \, \text{cm}/\text{roll} = 4 \, \text{rolls}
  2. Check calculation: Check the calculation for any errors.\newlineNo errors found in the division.

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