a) = 875 + 5 x 15 - 875
= ( 875 - 875 ) + 5 x 15
= 0 + 5 x 15
= 75
b) = 19,83 x ( 79 + 21 ) + ( 0,87542 + 0,12458 ) x 17
= 19,83 x 100 + 1,00000 x 17
= 1983 + 17
= 2000
a, 875 + 5x375:25 -875 = 5x5x75:25=75
b, 19,83 x79 + 0,12458x17 +21x19,83+17x0,87542=19,83x(79+21)+17x(0,12458+0,87542)=19,83x100 +17x1=1983+17= 2000
a, 875 + 5 × 375 ÷ 25 - 875
= 875 + 75 - 875
= 875 - 875 + 75
= 0 + 75
= 75
b, 19,83 × 79 + 0,12458 × 17 + 21 × 19,83 + 17 × 0,87542
=19,83 × ( 79 + 21 ) + 17 × ( 0,12458 + 0,87542 )
= 19,83 × 100 + 17 × 1
= 1983 + 17
= 2000
