二、解决问题
★单元练习8
建议用时:6分钟
实际用时:分钟
950+50 =
255-55 =
885+10 =
314+111 =
75+50 =
42÷7 =
31÷4 =
32÷5 =
60÷8 =
33÷6 =
4×6 =
36÷6 =
8×5 =
72÷9 =
62÷7 =
270+50 =
670-540 =
2800+100 =
750-500 =
355+15 =
700-10 =
950-80 =
160-70 =
61-25 =
74-17 =
85-6 =
80-50 =
31-5 =
76-18 =
35+29 =
4000+100 =
539-40 =
752-350 =
260+172 =
154+132 =
810-700 =
500-20 =
950-80 =
230+560 =
430-160 =
750+250 =
1000-300 =
730-450 =
800-290 =
420-350 =

950+50 = 1000
255-55 = 200
885+10 = 895
314+111 = 425
75+50 = 125
42÷7 = 6
31÷4 = 7……3
32÷5 = 6……2
60÷8 = 7……4
33÷6 = 5……3
4×6 = 24
36÷6 = 6
8×5 = 40
72÷9 = 8
62÷7 = 8……6
270+50 = 320
670-540 = 130
2800+100 = 2900
750-500 = 250
355+15 = 370
700-10 = 690
950-80 = 870
160-70 = 90
61-25 = 36
74-17 = 57
85-6 = 79
80-50 = 30
31-5 = 26
76-18 = 58
35+29 = 64
4000+100 = 4100
539-40 = 499
752-350 = 402
260+172 = 432
154+132 = 286
810-700 = 110
500-20 = 480
950-80 = 870
230+560 = 790
430-160 = 270
750+250 = 1000
1000-300 = 700
730-450 = 280
800-290 = 510
420-350 = 70

拓展园地
如图,红色部分表示乐乐的小红花数量,绿色部分表示豆豆的,黄色部分表示毛毛的,白色部分表示多多的。谁的小红花最多?

整个圆被平均分成12份：
乐乐的小红花占1份
豆豆的小红花占4份
毛毛的小红花占5份
多多的小红花占2份
5＞4＞2＞1
答：毛毛的小红花最多。