用你喜欢的方法计算下面各题.
⑴ + ﹣![]() |
⑵ ﹣ +![]() |
⑶ ﹣ ﹣![]() |
⑷ ﹣( ﹣ ) |
⑸ + ﹣![]() |
⑹ + + +![]() |
⑺ +( ﹣ ) |
⑻ ﹣ + ﹣ . |
直接写得数.
⑴ + = |
⑵ + = |
⑶ + = |
⑷ + = |
⑸ ﹣ = |
⑹ ﹣ = |
⑺ ﹣ = |
⑻ ﹣ = |
⑼ + = |
⑽ ﹣ = |
⑾ + = |
⑿1﹣ = |
解方程。
| ⑴4.8+x=10.3 |
⑵x÷0.6=4.5 |
⑶2x+12=28 |
| ⑷12x﹣4×7=44 |
⑸3.2x+x=23.94 |
⑹5x﹣2x=12.3. |
列式计算
(1)比0.32的5倍少3个0.5的数是多少?
(2)3.24与0.11的和乘以4,积是多少?
(3)7个0.245是多少?
能简算的要简算.
| ⑴3.4×12.5×0.15×8×2 |
⑵1.25×4.6×8 |
⑶3.14×9+3.14 |
| ⑷4.5×2.6+4.5×7.4 |
⑸125×0.74×0.08 |
⑹2.86×0.5×4.6. |