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The fourth grade of primary school, the second volume of mathematical oral calculation problems.
The fourth grade mathematics second volume oral calculation examination questions

27×3= 34+48= 3× 13= 180×4= 0.56-0.46= 4×25= 9.5-6= 0÷6=

57÷ 19= 720÷20= 3 100×2= 90÷ 15=

7 10-30= 7.8+0.7= 800÷ 10= 4200-600= 42×20= 1.3-0.8= 630÷90= 75-49= 26×6= 6-0.37 = 5400÷6= 680÷4= 90÷ 15= 1.8+ / kloc-0/.6= 120×5= 60×0= 2.73+0.27= 65 438+03×7= 800+55= 37+45= 0.75+0.3= 30×270= 5400÷90= 50×50=

2 1×4= 72-26= 300× 18= 64+36= 43÷ 1000= 780÷6= 0.69+ 1. 1= 38÷4=

450÷90= 20×35= 0.2× 100= 280+70= 320÷8= 7.8-5= 8-4.6= 2× 140=

6+6×4= 24×30= 0.7+0.5= 452÷ 100=

410-70 = 0.8×10 =1-0.26 = 25+300 ÷ 5 (25+300) ÷ 5 That's all, I'll think about it myself.

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