6.42×1.01-6.42
＝6.42x(1.01-1)
=6.42x0.01
=0.0642
80.7×8.7+8.07×13
=8.07x87+8.07x13
=8.07x(87+13)
=8.07x100
=807
第一6.42×1.01-6.42第二80.7×8.7+8.07×13
1个回答
相关问题
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(-7.33)×42.07+2.07×7.33 简便运算
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45÷9= 36÷4= 7×4= 4 × 6= 8×7= 72 ÷ 8= 63 ÷ 7= 42 ÷ 6= 5 × 8=
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口算．100-7= 17+8= 60÷8= 25×4= 600×5= 42÷6= 510×7≈ 2000×8= [7/8
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6×7=42 6.6×6.7=44.22 6.66×
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计算下面各题，能简算的要简算．①7.6×0.8+0.42 ②3.2×1.25×0.25 ③7.8×1.01 ④1.36+
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0.42×0.5=0.51÷1.7=5.2÷0.13=99×1.01=13.5-2.8-7.2=32.8+19=
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解方程 8x+42=82 [7/3×6−30%＝1.7
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直接写得数80÷4=6+0.6=80×30=7.8+0.5=1.1-0.4=240÷8=60×300=3500÷7=42
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4×3= 5×4= 6×2= 30÷5= 5÷5= 6+7= 14-8= 36÷6= 42-（8+34）= 81-7-7
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16÷8= 36÷6= 5×9= 81÷9= 7×3= 72÷8= 6×4= 7×3= 48÷6= 28÷7= 42÷6