2026年口算训练四年级数学下册北师大版双色升级版第86页答案
扬帆起航
$5.3 - 2.8 =$
2.5
$9.6 - 5.9 =$
3.7
$57 × 3 =$
171

$0.365 × 10 =$
3.65
$630 ÷ 70 =$
9
$660 - 180 =$
480

$950 + 180 =$
1130
$1 - 0.93 =$
0.07
$100 ÷ 25 =$
4

$6.7 + 3 =$
9.7
$110 × 60 =$
6600
$320 - 168 =$
152

答案

1. $5.3 - 2.8 = 2.5$
2. $9.6 - 5.9 = 3.7$
3. $57 × 3 = 171$
4. $0.365 × 10 = 3.65$
5. $630 ÷ 70 = 9$
6. $660 - 180 = 480$
7. $950 + 180 = 1130$
8. $1 - 0.93 = 0.07$
9. $100 ÷ 25 = 4$
10. $6.7 + 3 = 9.7$
11. $110 × 60 = 6600$
12. $320 - 168 = 152$
乘风破浪
$65.8 ÷ 100 =$
0.658
$0.35 + 0.43 =$
0.78
$5.8 - 5 =$
0.8

$25 × 6 =$
150
$376 - 198 =$
178
$1 - 0.08 =$
0.92

$130 × 3 =$
390
$75 - 26 =$
49
$7.25 × 1000 =$
7250

$8 - 0.72 =$
7.28
$780 ÷ 30 =$
26
$0.6 - 0.47 =$
0.13

$7.25 - 0.55 =$
6.7
$180 × 4 =$
720
$0.08 + 1.22 =$
1.3

$960 ÷ 80 =$
12
$45 - 17 =$
28
$0 ÷ 41 =$
0

$110 × 6 =$
660
$6.6 - 2.8 =$
3.8
$0.05 × 0.3 =$
0.015

$52 × 0.5 =$
26
$0.7 × 1.4 =$
0.98
$860 + 120 =$
980

答案

$65.8 ÷ 100 = 0.658$;
$0.35 + 0.43 = 0.78$;
$5.8 - 5 = 0.8$;
$25 × 6 = 150$;
$376 - 198 = 178$;
$1 - 0.08 = 0.92$;
$130 × 3 = 390$;
$75 - 26 = 49$;
$7.25 × 1000 = 7250$;
$8 - 0.72 = 7.28$;
$780 ÷ 30 = 26$;
$0.6 - 0.47 = 0.13$;
$7.25 - 0.55 = 6.7$;
$180 × 4 = 720$;
$0.08 + 1.22 = 1.3$;
$960 ÷ 80 = 12$;
$45 - 17 = 28$;
$0 ÷ 41 = 0$;
$110 × 6 = 660$;
$6.6 - 2.8 = 3.8$;
$0.05 × 0.3 = 0.015$;
$52 × 0.5 = 26$;
$0.7 × 1.4 = 0.98$;
$860 + 120 = 980$。
圆满返航
明明今年$b$岁,妈妈今年35岁,10年后妈妈比明明大(
35-b
)岁。
妈妈有$a$颗糖果,她给明明4颗后,两人就同样多,原来明明有(
a-8
)颗糖果。
秘籍点拨 ① 两人的年龄差是不变的。② 妈妈给明明4颗糖果之后,两人就同样多,妈妈是不是只比明明多4颗糖呢?画图试一试吧!
第87片

答案

35-b
a-8