问题 解答题
计算:
(1)|-21|+|-10|+|+9|;
(2)-4.3-(-6.3);
(3)(-10)÷(-
1
3
)
×(-4);
(4)(-24)×(
1
6
-
1
4
+
1
8
);
(5)4+3×(-2)3+33;           
(6)(-3)2×(-
1
3
2-(-2)3÷(-
1
2
2
答案

(1)原式=21+10+9

=40;

(2)原式=-4.3+6.3

=2;

(3)原式=-10×(-3)×(-4)

=-120;

(4)原式=-24×

1
6
+24×
1
4
-24×
1
8

=-4+6-3

=-1;

(5)原式=4+3×(-8)+27

=4-24+27

=4+3

=7;

(6)原式=9×

1
9
-(-8)×4

=1+32

=33.

单项选择题
单项选择题