问题 解答题
简算(写出简算的主要过程)
97
1
95
×
1
96
675×1.4+
3
5
×6
3
4
-6.75
12
1
2
×4
1
5
+125×0.26+1.25×32.
答案

(1)97

1
95
×
1
96

=(96+

96
95
1
96

=96×

1
96
+
96
95
×
1
96

=1+

1
95

=1

1
95

(2)675×1.4+

3
5
×6
3
4
-6.75

=6.75×140+0.6×6.75-6.75

=6.75×(140+0.6-1)

=6.75×139.6

=942.3;

(3)12

1
2
×4
1
5
+125×0.26+1.25×32

=12.5×4.2+12.5×2.6+12.5×3.2

=12.5×(4.2+2.6+3.2)

=12.5×10

=125.

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