23(12+0−5)= \frac{2}{3}(12+0-5)= 32(12+0−5)=
3 3 3
423 4\frac{2}{3} 432
3×214= 3\times2\frac{1}{4}= 3×241=
614 6\frac{1}{4} 641
634 6\frac{3}{4} 643
5×313= 5\times3\frac{1}{3}= 5×331=
3115 3\frac{1}{15} 3151
1623 16\frac{2}{3} 1632
9×389= 9\times3\frac{8}{9}= 9×398=
358081 35\frac{80}{81} 358180
35 35 35
10(0.75+1.2)= 10(0.75+1.2)= 10(0.75+1.2)=
8.7 8.7 8.7
19.5 19.5 19.5
5⋅(212+116+34)= 5\cdot\big(2\frac{1}{2}+1\frac{1}{6}+\frac{3}{4}\big)= 5⋅(221+161+43)=
1456 14\frac{5}{6} 1465
22112 22\frac{1}{12} 22121
9(13+14)= 9(\frac{1}{3}+\frac{1}{4})= 9(31+41)=
1214 12\frac{1}{4} 1241
514 5\frac{1}{4} 541
(13+512)×24= (\frac{1}{3}+\frac{5}{12})\times24= (31+125)×24=
935 9\frac{3}{5} 953
18 18 18
(13+911)×33= (\frac{1}{3}+\frac{9}{11})\times33= (31+119)×33=
33 33 33
38 38 38
13(92−34)= \frac{1}{3}(\frac{9}{2}-\frac{3}{4})= 31(29−43)=
−1 -1 −1
114 1\frac{1}{4} 141
x(13+12)= x(\frac{1}{3}+\frac{1}{2})= x(31+21)=
56x \frac{5}{6}x 65x
26x \frac{2}{6}x 62x