题目内容
列式计算
①
与
的和等于一个数的
,这个数是多少?
②
加上
除以
的商,所得的和乘
,积是多少?
③一个长方形周长是30厘米,长与宽的比是3:2,宽是多少厘米?
①
| 3 |
| 10 |
| 1 |
| 5 |
| 4 |
| 5 |
②
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
③一个长方形周长是30厘米,长与宽的比是3:2,宽是多少厘米?
①(
+
)÷
,
=
÷
,
=
;
答:这个数是
.
②(
+
÷
)×
,
=(
+
)×
,
=1×
,
=
;
答:积是
.
③30÷2×
,
=30÷2×
,
=30×
×
,
=6;
答:宽是6厘米.
| 3 |
| 10 |
| 1 |
| 5 |
| 4 |
| 5 |
=
| 1 |
| 2 |
| 4 |
| 5 |
=
| 5 |
| 8 |
答:这个数是
| 5 |
| 8 |
②(
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 4 |
=(
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
=1×
| 1 |
| 4 |
=
| 1 |
| 4 |
答:积是
| 1 |
| 4 |
③30÷2×
| 2 |
| 3+2 |
=30÷2×
| 2 |
| 5 |
=30×
| 1 |
| 2 |
| 2 |
| 5 |
=6;
答:宽是6厘米.
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