13+29= 78﹣28= 47+84= 32﹣16=
123+47= 800+222= 365﹣270= 450﹣190=
100﹣41= 188+112= 9000﹣800= 32+18﹣32+18=
230+55= 532+407= 998﹣104≈ 1米﹣( )=40厘米
7.3+1.7=
7.51+4.9=
4.7+3.8=
7+3.8=
5.6+3=
5.6+0.4=
8.5-2.9=
2-0.01=
4.2-3.5=
4.8-4=
7.6+2.5=
1.74+3.2=
3.8+4.02=
6.3+2.2=
6.26-3.6=
3.42+0.48=
9.37-6.5=
3.65+1.35=
1.25+0.8=
4.04+3.5=
1.76+2.8=
4.8-4.3=
8.26+7.2=
0.24+5.2=
0.8+0.02=
6.5-3.9=
4.4-3.6=
4.6+3=
4.4-3.9=
0.89+2.73=
32+56= 12×4= 540+230= 88-16=
80×0= 56-20= 32×3= 27+45=
63÷9= 580-220= 72-7= 30+30×4=
3000×3= 600-250= 280×5= 0×20+20=
+ = 1- = + = - =
700-203≈ 298×2≈ 3×69≈ 503+198≈
+= += += -=
+= -= += +=
+= += -= +=
81-58= 50×4= 41+29= 20×7=
540÷9= 66÷3= 48÷4= 93÷3=
3490>412 7749> 632 4497> 4236218>429 6267>540 209<2834
47+53= 420÷70= 100﹣28.5= 0.03×8= 234﹣199=
50×80= 2.7÷0.9= += 1÷= ×=