Current location - Training Enrollment Network - Mathematics courses - The first volume of mathematics in the fourth grade of primary school is oral arithmetic.
The first volume of mathematics in the fourth grade of primary school is oral arithmetic.
640÷80= 15×5= 23×3=

12×2×5= 480÷80= 16×5=

27×3= 90÷ 15= 48÷4=

640÷ 16= 39÷3= 24×20=

32×3= 48÷ 16= 12×8=

27×3= 56÷ 14= 24÷8=

14×2= 83-45= 560÷80=

96÷24= 40÷20= 40×30=

37+26= 76-39= 605+59=

30×23= 12×8= 27+32=

48+27= 4500×20= 73+ 15 =

120×600 = 200×360= 6800×400=

280+270= 4×2500= 6000÷40=

5× 1280= 3 10-70= 400× 14=

470+ 180= 1000÷25= 160×600=

20×420= 290×300= 8 100÷300=

7600÷200= 7600÷400= 680+270=

980÷ 14= 4200÷30= 6× 1300=

1300×50= 200×48= 930-660=

530+280= 9200÷400= 840÷2 1=

180×500= 8000÷500 = 1900÷20=

200× 160= 8700÷300= 300×330=

3× 1400= 7000÷ 14= 600÷ 12=

9600÷80= 140×300= 8800÷40=

9600÷800= 750-290= 5×490=

760×20= 7500÷500= 370×200=

650÷ 13= 8600-4200= 240×4=

640÷80= 15× 10= 12× 1 1=

160×30= 220×40= 104×5=

4500÷50= 20×2= 90÷30=

270÷30= 270×30= 84÷2 1=

76÷9= 66÷7= 100-54=

23+ 15= 360÷4= 55÷5=

32×6= 7000÷70= 200÷40=

180÷30= 240÷40= 35×2=

140×7= 13×6= 280×3=

350×2= 50× 1 1= 250×6=

7200+900= 4 10-20 1= 125×8=

48×20= 6600÷600= 390+ 140=

1 1×80= 24×50= 3600÷400=

4000÷50= 530-70= 420-90=

9600÷30= 7×700= 203+98=

1800÷300= 240+570= 4800÷400=

370+580= 580-490= 9 10-370=

420-90= 170+320= 1000-5 1=

520-260= 9 10- 190= 35×200=

22×200= 8800÷400= 9300÷300=

6×300= 1800÷200=