Մաթեմատիկա 21.09.21

79.
բ) 4242-(3415-1280)=2207
324216-(43015-1200):5=315853
215432-55x(42240:60-704)= 215432

80.
ա)                           բ)                գ)                          դ)
x423                      x 324                x5423                  x1240
84                            35                      53                      280
_____                       ____                _____                  ________

+1692                     +1620               +16269                +992

3392                          972                27115                   248

_______                 ________       ________               __________
35612                     11340             287419                  347200

81.
ա)  2324×72=167328           բ)8452×62= 524024                         գ)2500×160=400000

6540×840=5493600                 1180×340=401200                         1200×320=384000

  1. ա) 5կգ=5000գ
    7կգ250գ=7250գ
    5ց=500000գ
    5ց12կգ60գ=512060

    բ)

    5տ=50ց
    12տ7ց=127ց

    գ)

    12տ=1200կգ
    22տ5ց=22500
    25տ7կգ=25007
    4տ5ց=4562կգ

 

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