问题 解答题
脱式计算,能简算的要简算.
3.5×4.5×4;
12.6-1.9+1.9-3.39;
1÷[0.1÷(1.43-0.93)];4.4×4.6+5.4×4.4.
答案

(1)3.5×4.5×4

=3.5×(4.5×4)

=3.5×18

=63;

(2)12.6-1.9+1.9-3.39

=12.6-3.39+(1.9-1.9)

=9.21+0

=9.21;

(3)1÷[0.1÷(1.43-0.93)]

=1÷(0.1÷0.5)

=1÷0.2

=5;

(4)4.4×4.6+5.4×4.4

=(4.6+5.4)×4.4

=10×4.4

=44.

填空题
单项选择题