Question

简便计算：0.8×（4.3×7.25）

Answer 1

简便计算：0.8×（4.3×7.25）

0.8×（4.3×7.25）
=0.8×（4.3×1.25x5）
=0.8×1.25x5x4.3
=1x5x4.3
=21.5

7.25x9.2+7.28x0.8简便计算

解：7.25x9.2+7.28x0.8=7.25*9.2+（7.25+0.03）*0.8=7.25*（9.2+0.8）+0.024
=72.5+0.024=72.524。

7.25x0.35-7.25x0.25简便计算

7.25x0.35-7.25x0.25
=7.25x（0.35-0.25）
=7.25x0.1
=0.725

7.25乘0.35的简便计算

解：7.25x0.35
=7.25x(0.3+0.05)
=2.175+0.3625
=2.5375

7.25×0.35=2.54
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(-18.65）+（-7.25）+（18.15）+（7.25）=多少？要简便计算

第一个和第三个相加等于-0.5 第二个和第四个相加等于0 所以答案-0.5

7.25*0.35-72.5*0.025简便计算

7.25*0.35-72.5*0.025=7.25*0.35-7.25*0.25=7.25*（0.35-0.25）=0.725

7.25x0.35的简便计算

=(7+0.25)×0.35
=7×0.35+0.25×0.35
=2.45+0.0875
=2.3375

4.6减2.147减7.25简便计算

4.6-2.147-7.25
=4+0.6-(2+0.147)-(7+0.25)
=4+0.6-2-0.147-7-0.25
=4-2-7+0.6-0.25-0.147
=-5+0.35-0.147
=-5+0.35-0.14-0.007
=-5+0.21-0.007
=-5+0.203
=-5+0.2+0.003
=-4.8+0.003
=4.797

0.8×0.4÷0.8×0.4简便计算

0.8×0.4÷0.8×0.4简便计算
=（0.8÷0.8）x（0.4x0.4）
=1x0.16
=0.16