1) -32,3×7 10/13 +2 3/13×(-32,3)= -323
(7 10/13=7,8) (2 3/14=2,2)
- 32,3 ×7,8= -251,94
2,2 ×(-32,3) = -71,06
-251,94 + -71,06 = -323
2) 1,6×(-5,3) -2,4×(-5,3)+4 4/5×(-5,3)= -21,2
(4 4/5=4,8)
1,6×(-5,3 )= -8,48
2,4×(-5,3)= -12,72
4,8×(-5,3)= -25,44
-8,48 +12,72 + (-25,44)= - 33,92+12,72 = -21, 2
5,6×(-4 2/3)+ 6 47/48×5,6 - 25/16×5,6=0
(-4 2/3= -4,7) (6 47/48=7) (2 5/16=2,3)
5,6×(-4,7)= -26,32
7×5,6=39,2
2,3×5,6=12,88
(- 26,32) +39,2 - 12,88= -39, 2 +39,2=0