题目内容
脱式计算.
①2700×(506-499)÷900;
②33.02-(148.4-90.85)÷2.5;
③(1÷
+
÷1)÷5.1;
④(1.6×
+3.6÷
)×
.
①2700×(506-499)÷900;
②33.02-(148.4-90.85)÷2.5;
③(1÷
| 2 |
| 7 |
| 2 |
| 7 |
④(1.6×
| 5 |
| 8 |
| 3 |
| 4 |
| 4 |
| 29 |
①2700×(506-499)÷900
=2700÷900×7,
=3×7,
=21;
②33.02-(148.4-90.85)÷2.5
=33.02-57.55÷2.5,
=33.02-23.02,
=10;
③(1÷
+
÷1)÷5.1
=(
+
)×
,
=
×
,
=
;
④(1.6×
+3.6÷
)×
=(
×
+
×
)×
,
=(1+
)×
,
=
×
,
=
.
=2700÷900×7,
=3×7,
=21;
②33.02-(148.4-90.85)÷2.5
=33.02-57.55÷2.5,
=33.02-23.02,
=10;
③(1÷
| 2 |
| 7 |
| 2 |
| 7 |
=(
| 7 |
| 2 |
| 2 |
| 7 |
| 10 |
| 51 |
=
| 53 |
| 14 |
| 10 |
| 51 |
=
| 265 |
| 357 |
④(1.6×
| 5 |
| 8 |
| 3 |
| 4 |
| 4 |
| 29 |
=(
| 8 |
| 5 |
| 5 |
| 8 |
| 18 |
| 5 |
| 4 |
| 3 |
| 4 |
| 29 |
=(1+
| 24 |
| 5 |
| 4 |
| 29 |
=
| 29 |
| 5 |
| 4 |
| 29 |
=
| 4 |
| 5 |
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