题目内容
计算下面各题(能简算的要简算)
①0.25×37+
+62÷4
②(
+
-
)÷12
③1.21×42-(4.46+
)
④3.5÷[1.4×(0.1-0.05)
①0.25×37+
| 1 |
| 4 |
②(
| 3 |
| 4 |
| 5 |
| 6 |
| 11 |
| 12 |
③1.21×42-(4.46+
| 7 |
| 50 |
④3.5÷[1.4×(0.1-0.05)
①0.25×37+
+62÷4,
=
×37+
×1+62×
,
=(37+1+62)×
,
=100×
,
=25;
②(
+
-
)÷12,
=(
-
)÷12,
=
÷12,
=
;
③1.21×42-(4.46+
),
=1.21×42-4.6,
=50.82-4.6,
=46.22;
④3.5÷[1.4×(0.1-0.05)],
=3.5÷[1.4×0.05],
=3.5÷0.07,
=50.
| 1 |
| 4 |
=
| 1 |
| 4 |
| 1 |
| 4 |
| 1 |
| 4 |
=(37+1+62)×
| 1 |
| 4 |
=100×
| 1 |
| 4 |
=25;
②(
| 3 |
| 4 |
| 5 |
| 6 |
| 11 |
| 12 |
=(
| 19 |
| 12 |
| 11 |
| 12 |
=
| 8 |
| 12 |
=
| 1 |
| 18 |
③1.21×42-(4.46+
| 7 |
| 50 |
=1.21×42-4.6,
=50.82-4.6,
=46.22;
④3.5÷[1.4×(0.1-0.05)],
=3.5÷[1.4×0.05],
=3.5÷0.07,
=50.
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