问题 解答题
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=
答案

(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.

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