Matematyka wokół nas 1 strona 129 zadanie 11,12.
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zad.11/str.129
c) - 4½+⅙+(- ½)+1⅓=
d) 6,25+(- ¼)+(- ⅗)+0,75=
e) ⁴/₇+(- ³/₁₄)+¹/₁₄=
f) ¹/₂+(- ³/₄)+(- ⁵/₈)=
g) 5⅔+(- 3⅘)+⅓+(- ⅕ )=
h) 16⅘+(-4,8)+3⅕+(- 4⅕)=
zad.12./str.129
a) 2,2+ ¹²/₇ +(- 1,2)+(-1 ⁵/₇)=
b) 6½+ (-3,25)+(-1 ¾)+1=
c)-3,9+⁵/₈+(-0,1)+0,375=
d)-(-(-3)+(-2))+(-(-3))=
e)-15+(- 4 -(-7))-(-8)+(-11)=
f) 28-39+(-14)- (-12)-81=
g)37 + (-18)-(-(-48))+(-9)=
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-41/2+1/6+ (-1/2)+11/3 = -4 3/6 + 1/6 -3/6 +1 2/6 =-4 3/6 - 3/6 +1/6 +1 2/6 = -5 +1 3/6 = - 3 1/2
d/ 6,25 + (-1/4) + (-3/5 )+0,75 = 6,25 -0,25 -0,6+0,75 = 6,15
e/ 4/7+ (-3/14 ) +1/14 = 8/14 -3/14 +1/14 = 6/14
f) 1/2 + (-3/4 ) + (-5/8 ) = 4/8 -6/8 -5/8 = -7/8
g/ 5 2/3 + (-3 4/5) + 1/3 +(-1/5) = 5 2/3 - 3 4/5 +1/3 - 1/5 = 6 -4 =2
h/16 4/5 + (-4,8) + 3 1/5 + ( -4 1/5 ) = 16,8 -4,8 +3,2 - 4,2 = 20 - 9= 11
a/ 2,2 +12/7 + (-1,2)+ (-1 5/7) = 2,2 -1,2 +1 5/7 -1 5/7 = 1
b/ 6 1/2 + (-3,25) + (-1 3/4) +1 = 6,5 - 3,25- 1,75 +1= 7,5- 5 = 2,5
c/ -3,9+5/8 +(-0,1)+ 0,375= -3,9 + 0,625 -0,1 +0,375 = -4 +1=-3
d/ -(- (-3)+(-2)) + (- (-3)) = - (3-2)+3 = -3 +2 +3 = 2
e/ -15 + (-4- (-7))- (-8)+ (-11)= brakuje nawiasu= -15-4+7 +8-11= -30+15=- 15
f/ 28-39 + (-14)- (-12)-81= 28-39-14+12-81= 40- 134= - 40
g/ 37 + (-18) -(-48))+(-9) = 37-18+48-9= 85- 27=58