问题 解答题
用简便方法计算.
41×101

10.5÷2.5÷4

1.7÷4+2.3×25%
答案

(1)41×101,

=41×100+41×1,

=4100+41,

=4141;

(2)10.5÷2.5÷4,

=10.5÷(2.5×4),

=10.5÷10,

=1.05;

(3)1.7÷4+2.3×25%,

=1.7×

1
4
+2.3×
1
4

=(1.7+2.3)×

1
4

=4×

1
4

=1.

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