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用递等式计算3.41-1.97+0.49-1.0342.8-(12.5÷2.5)0.125×64×0.25.

题目详情
用递等式计算
3.41-1.97+0.49-1.03      42.8-(12.5÷2.5)0.125×64×0.25.
▼优质解答
答案和解析
(1)3.41-1.97+0.49-1.03
=(3.41+0.49)-(1.97+1.03)
=3.9-3
=0.9;

(2)42.8-(12.5÷2.5)
=42.8-5
=37.8;

(3)0.125×64×0.25
=0.125×(8×8)×0.25
=(0.125×8)×(8×0.25)
=1×2
=2.