1、
(1) | (2) | (3) | (4) |
A | B | A | A |
2、>;<;>;>;>;<
3、第一列:0.96;23;50;20;30
第二列:13;6;100;2;50
4、 图1:0.4;0.4;0.16÷(0.5×0.8)
图2:从左到右:6.4;0.16;40;(2.6+3.8)÷(0.2×0.8)
5、9.8×[2.5-(0.95+1.3)]
=9.8×(2.5-2.25)
=9.8×0.25
=2.45
8.4÷(9.2-6.8)×40
=8.4÷2.4×40
=3.5×40
=140
5.4÷[3×(3.8-2.9)]
=5.4÷(3×0.9)
=5.4÷2.7
=2
0.5×[(0.09+1.29)÷0.23]
=0.5×(1.38÷0.23)
=0.5×6
=3
8÷[(9-8.98)×2.5]
=8÷(0.02×2.5)
=8÷0.05
=160
[7.1-(1.56+1.54)] ÷2.5
=(7.1-3.1)÷2.5
=4÷2.5=1.6
6、16.5÷12=1.375(元)
22.5÷20=1.125(元)
买第二种的便宜
7、(331.63-76.63)÷3
=255÷3
=85(吨)
8、720÷(585÷19.5)
=720÷30
=24(分钟)
9、858÷[65+(65×1.2)]
=858÷(65+78)
=858÷143
=6(小时)
10、[215.55-(10.8×14)] ÷11.7
=(215.55-151.2)÷11.7
=64.35÷11.7
=5.5(天)
11、[28.6-(3×3.2)] ÷4
=(28.6-9.6)÷4
=19÷4
=4.75(元)