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用递等式计算下面各题.1.22×30÷0.15=0.25×7200×0.4=3.25÷2.5×1.2=(40-7.36-0.64)÷0.8=

题目详情
用递等式计算下面各题.
1.22×30÷0.15=
0.25×7200×0.4=
3.25÷2.5×1.2= (40-7.36-0.64)÷0.8=
▼优质解答
答案和解析
(1)1.22×30÷0.15
=36.6÷0.15
=244;

(2)0.25×7200×0.4
=0.25×0.4×7200
=0.1×7200
=720;

(3)3.25÷2.5×1.2
=1.3×1.2
=1.56;

(4)(40-7.36-0.64)÷0.8
=[40-(7.36+0.64)]÷0.8
=32÷0.8
=40.