直接写得数.
= | = | = | 1-= |
= | = | = | = |
解方程.
(1)x-12.5%x=5 | (2)56%x-11%x=135 | (3)18x-96=120 | (4)9x+42=168. |
直接写出得数.
14×50﹦ | 2800÷7﹦ | 600×4﹦ | 72÷8+7﹦ |
51×19≈ | 301×49≈ | 279×39≈ | 99×73≈ |
直接写得数.
120×3= | 540×2= | 5×800= | 205×3= |
400×7= | 16×5= | 1200÷4= | 30÷3= |
= | = | = | 1-= |
= | = | = | = |
(1)x-12.5%x=5 | (2)56%x-11%x=135 | (3)18x-96=120 | (4)9x+42=168. |
14×50﹦ | 2800÷7﹦ | 600×4﹦ | 72÷8+7﹦ |
51×19≈ | 301×49≈ | 279×39≈ | 99×73≈ |
120×3= | 540×2= | 5×800= | 205×3= |
400×7= | 16×5= | 1200÷4= | 30÷3= |