题目内容

口算:
298+76=
6.4-4=0.25×124.8÷0.01
90%×30%
1
8
×
1
8
=
5
8
+
1
4
=
1
3
÷
5
6
=
3
8
×
4
9
=
0.3×2÷0.3×2.
298+76=374; 6.4-4=2.4; 0.25×12=3; 4.8÷0.01=480;
90%×30%=0.27; 1÷
1
8
×
1
8
=1;
5
8
+
1
4
=
7
8
1
3
÷
5
6
=
2
5

3
8
×
4
9
=
1
6
;0.3×2÷0.3×2=4.
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