0.13×100= | 7×(68+22)= | 5×4÷5×4= | |
3.26-1.61= | 920÷20= | 398×51≈ | 9.2-3.2+6.8-9.2= |
+=( )
+= | += | -= | 1-= |
51×7≈ | 49×6≈ | 299+103≈ | 701−198≈ |
24×2= | 240+550= | 904-201= | 2×900= | += |
1-= | 103×5= | 196×4≈ | 20×5-100= | 72÷(107-98)= |
250+450= | 560-400= | 230×3= | 25×4×5= |
+= | 1-= | += | -= |
1003-799≈ | 197+402≈ | 198×4≈ | 81×7≈ |