1. 口算。(建议用时4分钟)
$40 + 52 =$
$170 × 5 =$
$600 - 340 =$
$8 × 130 =$
$102 × 6 =$
$420 × 5 =$
$92 + 80 =$
$352 ÷ 4 =$
$58 + 34 =$
$610 × 4 =$
$800 - 360 =$
$9 × 110 =$
$43 + 55 =$
$180 × 4 =$
$770 ÷ 7 =$
$320 + 570 =$
$7 × 15 =$
$96 - 77 =$
$400 × 5 =$
$840 ÷ 4 =$
$920 ÷ 2 =$
$1000 - 660 =$
$32 + 59 =$
$4 × 34 =$
$40 + 52 =$
$170 × 5 =$
$600 - 340 =$
$8 × 130 =$
$102 × 6 =$
$420 × 5 =$
$92 + 80 =$
$352 ÷ 4 =$
$58 + 34 =$
$610 × 4 =$
$800 - 360 =$
$9 × 110 =$
$43 + 55 =$
$180 × 4 =$
$770 ÷ 7 =$
$320 + 570 =$
$7 × 15 =$
$96 - 77 =$
$400 × 5 =$
$840 ÷ 4 =$
$920 ÷ 2 =$
$1000 - 660 =$
$32 + 59 =$
$4 × 34 =$
答案
1. 92
850
260
1040
612
2100
172
88
92
2440
440
990
98
720
110
890
105
19
2000
210
460
340
91
136
850
260
1040
612
2100
172
88
92
2440
440
990
98
720
110
890
105
19
2000
210
460
340
91
136
2. 用竖式计算。(建议用时2分钟)
216×8=
602÷5=
9×627=
216×8=
602÷5=
9×627=
答案
2. 1728
120……2
5643
120……2
5643
3. 计算下面各题。(建议用时2分钟)
361−69−22
740÷2÷5
5×(227+183)
361−69−22
740÷2÷5
5×(227+183)
答案
3. 270
74
2050
74
2050
4. 解决问题。(建议用时2分钟)
如图,$∠ 1=75°$,$∠ 2=25°$,分别求出$∠ 3$、$∠ 4$、$∠ 5$的度数。

如图,$∠ 1=75°$,$∠ 2=25°$,分别求出$∠ 3$、$∠ 4$、$∠ 5$的度数。
答案
4. $∠ 3=180°-75°-25°=80°$
$∠ 4=180°-25°-80°=75°$
$∠ 5=180°-75°=105°$
$∠ 4=180°-25°-80°=75°$
$∠ 5=180°-75°=105°$
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