
脱式计算.0.25×1.25×
脱式计算.0.25×1.25×4×82.125×14+1.875÷4(2.5-0.125)×0.8+6.242÷23-23÷22.25×4.8+77.5×0.4836×(...
脱式计算.0.25×1.25×4×8 2.125×14+1.875÷4 (2.5-0.125)×0.8+6.24 2÷23-23÷2 2.25×4.8+77.5×0.48 36×(29+712)
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(1)0.25×1.25×4×8,
=(0.25×4)×(1.25×8),
=1×10,
=10;
(2)2.125×
+1.875÷4,
=(2.125+1.875)×
,
=4×
,
=1;
(3)(2.5-0.125)×0.8+6.24,
=2.5×0.8-0.125×0.8+6.24,
=2-0.1+6.24,
=8.14,
(4)2÷
-
÷2,
=2×
-
×
,
=3-
,
=2
;
(5)2.25×4.8+77.5×0.48,
=(22.5+77.5)×0.48,
=100×0.48,
=48;
(6)36×(
+
),
=36×
+36×
,
=8+21,
=29.
=(0.25×4)×(1.25×8),
=1×10,
=10;
(2)2.125×
1 |
4 |
=(2.125+1.875)×
1 |
4 |
=4×
1 |
4 |
=1;
(3)(2.5-0.125)×0.8+6.24,
=2.5×0.8-0.125×0.8+6.24,
=2-0.1+6.24,
=8.14,
(4)2÷
2 |
3 |
2 |
3 |
=2×
3 |
2 |
2 |
3 |
1 |
2 |
=3-
1 |
3 |
=2
2 |
3 |
(5)2.25×4.8+77.5×0.48,
=(22.5+77.5)×0.48,
=100×0.48,
=48;
(6)36×(
2 |
9 |
7 |
12 |
=36×
2 |
9 |
7 |
12 |
=8+21,
=29.

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