题目内容
计算下面各题.
①7.3×5.2+14.6
②1379+450÷18×40
③(
-
)×
④3÷4+
×3
⑤(
÷
+
)×
⑥
÷[
-(
+
)].
①7.3×5.2+14.6
②1379+450÷18×40
③(
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 7 |
④3÷4+
| 3 |
| 4 |
⑤(
| 9 |
| 10 |
| 3 |
| 5 |
| 1 |
| 2 |
| 3 |
| 4 |
⑥
| 3 |
| 5 |
| 7 |
| 8 |
| 2 |
| 5 |
| 3 |
| 8 |
①7.3×5.2+14.6
=37.96+14.6
=52.56;
②1379+450÷18×40
=1379+25×40
=1379+1000
=2379;
③(
-
)×
=
×
=
;
④3÷4+
×3
=
+
×3
=(1+3)×
=4×
=3;
⑤(
÷
+
)×
=(
×
+
)×
=(
+
)×
=2×
=1
;
⑥
÷[
-(
+
)]
=
÷[
-
].
=
÷
=6.
=37.96+14.6
=52.56;
②1379+450÷18×40
=1379+25×40
=1379+1000
=2379;
③(
| 1 |
| 2 |
| 1 |
| 3 |
| 3 |
| 7 |
=
| 1 |
| 6 |
| 3 |
| 7 |
=
| 1 |
| 14 |
④3÷4+
| 3 |
| 4 |
=
| 3 |
| 4 |
| 3 |
| 4 |
=(1+3)×
| 3 |
| 4 |
=4×
| 3 |
| 4 |
=3;
⑤(
| 9 |
| 10 |
| 3 |
| 5 |
| 1 |
| 2 |
| 3 |
| 4 |
=(
| 9 |
| 10 |
| 5 |
| 3 |
| 1 |
| 2 |
| 3 |
| 4 |
=(
| 3 |
| 2 |
| 1 |
| 2 |
| 3 |
| 4 |
=2×
| 3 |
| 4 |
=1
| 1 |
| 2 |
⑥
| 3 |
| 5 |
| 7 |
| 8 |
| 2 |
| 5 |
| 3 |
| 8 |
=
| 3 |
| 5 |
| 7 |
| 8 |
| 31 |
| 40 |
=
| 3 |
| 5 |
| 1 |
| 10 |
=6.
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