题目内容
用递等式计算.
①5.4÷(3.94+0.86)×0.8
②8×(20-1.25)
①5.4÷(3.94+0.86)×0.8
②8×(20-1.25)
①5.4÷(3.94+0.86)×0.8,
=5.4÷4.8×0.8,
=1.125×0.8,
=0.9;
②8×(20-1.25),
=8×20-8×1.25,
=160-10,
=150.
=5.4÷4.8×0.8,
=1.125×0.8,
=0.9;
②8×(20-1.25),
=8×20-8×1.25,
=160-10,
=150.
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