1. 15+25=40
2. 36-20=16
4. 42÷7=6
5. 16+8=24
7. 9x6=54
8. 72÷9=8
9. 27+18=45
四年级五十道简便运算急求答案,帮忙回答下
1. 15+25=40
2. 36-20=16
4. 42÷7=6
5. 16+8=24
7. 9x6=54
8. 72÷9=8
9. 27+18=45
1. 2 + 3 = 5
2 + 3 = 5
3 = 5
4 + 6 = 10
5
6 = 10
7 + 3 = 10
8 + 2 = 10
9. 6 + 4 = 10
10