Question

thuc hien phep tinh

a)43.37+93.43+57.61+69.57

b)39.8+60.2+21.8

Answer 1

a) = 43.(37+93) + 57.(61+69)

    = 43. 130 + 57. 130

    = 130 . (43+57)

    = 130 . 100

    = 13000

b) = 8.(39+21) + 60.2

    = 8.60 + 60.2

    = 60.(8+2)

    = 600

k giùm nha 

Answer 2

a) 43.37+93.43+57.61+69.57= (37+93).43+(61+69).57=130.43+130.57=(43+57).130=100.130=13000

b)39.8+60.2+21.8=(39+21).8+60.2=60.8+60.2=(8+2).60=10.60=600