21+18= | 760-40= | 640+60= |
402-297≈ | 2100-900= | 6000-1000= |
3.3+9.7= | 24×45×0= | 100-42= | 39÷10= | 49.2×100= | 57+43= |
73.5÷10= | 0.85×100= | 12×6×5= | 55+32+68= | 54.7÷100= | 64.7×10= |
16÷2= | 6×7 = | 200 +450= | 1600- 900= | 4×7-5= |
10÷5= | 42÷6= | 160-40= | 400 +3000 = | 36÷4÷3= |
45÷9= | 35÷7= | 39-24= | 700+500= | 5×(12÷4)= |
24÷3= | 35+33= | 570-300 = | 8000-2000= | 6×(63÷9)= |
4600-400= | 110-60= | 600+340= | 1000-600= |
1400+900= | 63-45= | 90+70= | 900+800= |
74+25= | 32+58= | 70+800= | 570-200= |
60+170= | 80-18= | 6000-4000= | 75-36= |
587+239≈ | 412-106≈ | 232+273≈ | 986-375≈ |
560+80= | 6000+2000= | 450+210= | 1000-200= |
84-48= | 1600+300= | 745-20= | 680-400= |
891-309≈ | 209+196≈ | 412+497≈ | 904-707≈ |
7×9= | 5×7= | 960-900= | 63÷9×3= |
45÷9= | 54-9= | 800+90= | 48÷8÷6= |
36÷6= | 56÷7= | 8300-300= | 9000+90+9= |
6×8= | 72+8= | 700+2000= | 3000+500+20= |
3×6= | 63-7= | 300+2= | 460-60= |
72÷8= | 50+800= | 48-6= | ( )×( )=36 |
15÷4= | 3200-3000= | 2000+70= | ( )÷8=6……4 |