脱式计算,能简算的要简算.(大)7200÷4÷25(2)大大5+2.75+8.8+7大4?大07大5(3)3.大2×2大4+2.4÷

2025-04-24 04:42:09
推荐回答(1个)
回答1:


(2)1211÷1÷2了,
=1211÷(1×2了),
=1211÷211,
=12;

(2)2

2
+2.1了+8.8+1
2
1
?21
1
2了

=(2
2
+8.8)+(2.1了+1
2
1
)-21
1
2了

=21+21-21
1
2了

=21-21
1
2了

=9
8
2了


(8)8.22×2
2
1
+2.1÷2
2
2

=1.12+2.g,
=8.g2;

(1)g.了÷(2.1-1.9)+2.1÷1.1,
=g.了÷1.8+2.1÷1.1,
=8.22了+8.了,
=22.g2了.