计算下列各题:114×7.3+3.7×1.25-1.
计算下列各题:114×7.3+3.7×1.25-1.25(7.9-25.6×14)÷593.25×109+32.5÷1181920+2930+4142+5556+7172...
计算下列各题:114×7.3+3.7×1.25-1.25 (7.9-25.6×14)÷59 3.25×109+32.5÷118 1920+2930+4142+5556+7172.
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(1)1
×7.3+3.7×1.25-1.25
=1.25×7.3+3.7×1.25-1.25,
=(7.3+3.7-1)×1.25,
=10×1.25,
=12.5;
(2)(7.9-25.6×
)÷
=(7.9-6.4)×
,
=1.5×
,
=2.7;
(3)3.25×
+32.5÷1
=3.25×10×
+32.5×
,
=32.5×
+32.5×
,
=(
+
)×32.5,
=1×32.5,
=32.5;
(4)
+
+
+
+
=(1-
+(1-
)+(1-
)+(1-
)+(1-
),
=1×5-(
+
+
+
+
),
=5-(
-
1 |
4 |
=1.25×7.3+3.7×1.25-1.25,
=(7.3+3.7-1)×1.25,
=10×1.25,
=12.5;
(2)(7.9-25.6×
1 |
4 |
5 |
9 |
=(7.9-6.4)×
9 |
5 |
=1.5×
9 |
5 |
=2.7;
(3)3.25×
10 |
9 |
1 |
8 |
=3.25×10×
1 |
9 |
8 |
9 |
=32.5×
1 |
9 |
8 |
9 |
=(
1 |
9 |
8 |
9 |
=1×32.5,
=32.5;
(4)
19 |
20 |
29 |
30 |
41 |
42 |
55 |
56 |
71 |
72 |
=(1-
1 |
20 |
1 |
30 |
1 |
42 |
1 |
56 |
1 |
72 |
=1×5-(
1 |
20 |
1 |
30 |
1 |
42 |
1 |
56 |
1 |
72 |
=5-(
1 |
4 |