Question

2 a) Află numărul necunoscut din fiecare expresie, după exemplul oferit.
= 551
720: a + 450:3 = 240 %
720:a + 150 = 240
720: a = 240 - 150
720:a= 90
a = 720:90
8
a + 190 + 190: 10 = 300 D
20 x e-(1 950 + 550): 100 = 6175
575 - b x 32 – 45 = 50 | 35xf+(800-752:4): 2
C-(600-315:9) = 335 C
= 335 C 8:25+ (100 - 1 632 : 51) x2 = 286
(100 x d - 110): 39 = 10 5 244 - h 5+ (300 - 6 x 16): 4 = 255L
a =
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Answer 1

Răspuns:

a+190+190:10=300

a+190+19=300

a+190=300-19

a+190=281

a=281-190

a=91

575-bx32-45=50

575-bx32=50+45

575-bx32=95

bx32=575-95

bx32=480

b=480:32

b=15

c-(600-315:9) = 335

c-(600-35)=335

c-565=335

c=565+335

c=900

(100 x d - 110): 39 = 10

(100xd-110)=10x39

100xd-110=490

100xd=490+110

100xd=600

d=600:100

d=6

20 x e-(1 950 + 550): 100 = 6175

20xe-2500:100=6175

20xe-25=6175

20xe=6175+25

20xe=6200

e=6200:20

e=310

35xf+(800-752:4):2=551

35xf+(800-188):2=551

35xf+612:2=551

35xf+306=551

35xf=551-306

35xf=245

f=245:35

f=7

g:25+(100-1632:51)X2=286

g:25+(100-32)X2=286

g:25+68x2=286

g:25+136=286

g:25=286-136

g:25=150

g=150x25

g=3750

244 - h x5+ (300 - 6 x 16): 4 = 255

244-hx5+(300-96):4=255

244-hx5+204:4=255

244-hx5+51=255

244-hx5=255-51

244-hx5=204

hx5=244-204

hx5=40

h=40:5

h=8