问题
解答题
快速口算
|
答案
31+42=73, | 42-15=27, | 500×9=4500, | 75-33=42, |
3×13=39, | 120×3=360, | 25+38=63, | 15×5=75, |
28+35=63, | 86÷2=43, | 500×9=4500, | 93÷3=31, |
12×4=48, | 70-32=38, | 1100-400=700, | 500×9=4500, |
快速口算
|
31+42=73, | 42-15=27, | 500×9=4500, | 75-33=42, |
3×13=39, | 120×3=360, | 25+38=63, | 15×5=75, |
28+35=63, | 86÷2=43, | 500×9=4500, | 93÷3=31, |
12×4=48, | 70-32=38, | 1100-400=700, | 500×9=4500, |