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20道 乘法

31x27 53x32 57x41 22x79 50x67 92x37 43x82 11x64 63x72 21x58 22x80 24x35 19x66 30x54 79x20 83x43 71x67 38x85 88x24 63x77

1/2×1/2=1/4 1/2×1/3=1/6 …… 1/2×1/100=1/200

5*18 3*27 89*5 32*45 56*7 99/9 56/8 32/8 44/11 14/7

五年级小数乘法作业2014年9月22日 1.12×1.1= 0.326×1.3=6.5×6.5=3.3×2.6= 0.98×5.5=2.1×2.15=5.2×2.9=0.48×8.1= 4.2×0.8=1.5×6.2=3.45×102=2.7×0.11= 0.56×1.3=1.47÷0.7=12.5×0.8=1.5×0.4= 4.8×0.25=0.125×1.4=0.18×15=9.5×1...

1、分解因数,凑整先求 25×32×125 937×125×25×64×5 80×16×25×125 125×5×32×5 56×125 2、利用乘法分配律简算 46×101 17×999 125×98 37×99 234×102 (100-4)×25 3、逆用乘法分配律简算 95×71+95×29 64×25+35×25+25 123×235-24×235+235 586×12...

1.2+9=10.2 5.43-3.06=2.37 3+1.2=4.2 0.12+5=5.12 1.2+1.8+1.4=4.4 6.2+16+3.8=26 14-0.6=13.4 20.3-8=12.3 50-1.5+4= 53.5 175-0.56=174.44 2.08+11=13.089 0.4+20= 20.4 2.5+67+7.5=77 4.5-3=1.5 25-0.38=...

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5.6×2.9 3.77×1.8 0.02×96 5.22×0.3 9.99×0.02 4.67×0.9 5×2.44 1.666×6.1 9.432×0.002 5.6×6.5 4.88×2.9 5.61×4.3 8.9×2.4 5.5×55 9.77×0.02 1.384×5.1 8.78×83 2.6×61 0.059×0.2 4.268×1.7 57×5.7 9.46×2.85 17.8×6.4 1.5×4.9 2.5×0.88 5.555×...

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2×2=4 2×3=6 2×4=8 2×5=10 3×3=9 3×4=12 3×5=15 4×4=16 4×5=20 5×5=25 2×2×2=8 2×2×3=12 2×2×4=16 2×2×5=20 2×3×4=24 2×3×5=30 2×3×3=9 2×4×4=32 2×4×5=40 2×5×5=50

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