10 Mnożenie ułamka przez liczbę

Presentation

•

Mathematics

•

4th - 5th Grade

•

Medium

Agnieszka Ziegert

Used 15+ times

FREE Resource

13 Slides • 22 Questions

Mnożenie ułamka przez liczbę

z kluczem

FILMIK

Mamy trzy porcje po pół jabłka

Spróbujmy obliczyć ile to jest
$\frac{1}{2}+\frac{1}{2}+\frac{1}{2}=\frac{3}{2}=1\frac{1}{2}$
Możemy to zapisać inaczej
$3\cdot\frac{1}{2}=$
Jak to obliczyć
$3\cdot\frac{1}{2}=\frac{3\cdot1}{2}=\frac{3}{2}=1\frac{1}{2}$

Na stole leży 5 porcji po $\frac{2}{3}$ mandarynki
$\frac{2}{3}+\frac{2}{3}+\frac{2}{3}+\frac{2}{3}+\frac{2}{3}=\frac{10}{3}=3\frac{1}{3}$
$5\cdot\frac{2}{3}=\frac{5\cdot2}{3}=\frac{10}{3}=3\frac{1}{3}$

Fill in the Blanks

$4\cdot\frac{1}{5}=$

Type answer...

Fill in the Blanks

$3\cdot\frac{2}{7}=$

Type answer...

Fill in the Blanks

$5\cdot\frac{3}{7}=$

Type answer...

Fill in the Blanks

$6\cdot\frac{4}{11}=$

Type answer...

Czasem możemy uprościć obliczenia

Fill in the Blanks

$5\cdot\frac{3}{5}=$

Type answer...

Fill in the Blanks

$13\cdot\frac{5}{13}=$

Type answer...

Fill in the Blanks

$12\cdot\frac{5}{6}=$

Type answer...

Fill in the Blanks

$4\cdot\frac{3}{20}=$

Type answer...

Fill in the Blanks

$6\cdot\frac{2}{18}=$

Type answer...

Fill in the Blanks

$5\cdot\frac{3}{25}=$

Type answer...

Fill in the Blanks

$4\cdot\frac{3}{24}=$

Type answer...

Fill in the Blanks

$3\cdot\frac{4}{18}=$

Type answer...

Fill in the Blanks

$5\cdot\frac{3}{30}=$

Type answer...

Fill in the Blanks

$15\cdot\frac{7}{45}=$

Type answer...

Fill in the Blanks

$12\cdot\frac{6}{48}=$

Type answer...

A co gdy mamy takie działanie?

2\cdot3\frac{1}{7}=

Zamieniamy na ułamek niewłaściwy i mnożymy
$2\cdot3\frac{1}{7}=2\cdot\frac{22}{7}=\frac{44}{7}=6\frac{2}{7}$

Fill in the Blanks

$3\cdot2\frac{1}{5}=$

Type answer...

Fill in the Blanks

$3\cdot1\frac{2}{5}=$

Type answer...

Fill in the Blanks

$4\cdot2\frac{2}{3}=$

Type answer...

Jak jest możliwość, to skracamy

3\cdot1\frac{5}{6}=3\cdot\frac{11}{6}=\frac{11}{2}=5\frac{1}{2}

Fill in the Blanks

$3\cdot2\frac{1}{9}=$

Type answer...

Fill in the Blanks

$4\cdot2\frac{3}{8}=$

Type answer...

Fill in the Blanks

$12\cdot2\frac{1}{6}=$

Type answer...

Poll

Na ile rozumiesz ten temat?

super

bardzo dobrze

dobrze

słabo

nic nie rozumiem

Mnożenie ułamka przez liczbę

z kluczem

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