问题
解答题
|
答案
17×4=68 | 240×3=720 | 80÷20=4 | 560÷70=8 |
49×61≈3000 | 718÷89≈8 | 198×52≈10000 | 3050÷51≈61 |
490+80=570 | 650-300=350 | 130×50=6500 | 120×0÷20=0 |
9×6-4=50 | 180÷30+3=9 |
|
17×4=68 | 240×3=720 | 80÷20=4 | 560÷70=8 |
49×61≈3000 | 718÷89≈8 | 198×52≈10000 | 3050÷51≈61 |
490+80=570 | 650-300=350 | 130×50=6500 | 120×0÷20=0 |
9×6-4=50 | 180÷30+3=9 |