Hasil pengerjaan dari 23 x (-27) adalah ….

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Mathematics
•
6th Grade
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Hard
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1.
FLASHCARD QUESTION
Front
Back
-621
2.
FLASHCARD QUESTION
Front
(-48) x 42 = ....
Back
-2.016
3.
FLASHCARD QUESTION
Front
Hasil operasi hitung dari 375 : 25 adalah . . . .
Back
15
4.
FLASHCARD QUESTION
Front
Hasil pengerjaan dari (-24) + (-26) x 15 adalah . . . .
Back
(-24) + (-26) x 15 = (-24) + (-390)
= (-24) – 390
= – (24 + 390)
= – 414
5.
FLASHCARD QUESTION
Front
Ibu membuat taplak meja yang berbentuk lingkaran dengan panjang jari jari 42 cm, maka luas meja yang dibuat ibu adalah …. cm.
Back
Luas lingkaran = phi x r x r
= 22/7 x 42 x 42
= 22 x 6 x 42
= 132 x 42
= 5.544 cm².
6.
FLASHCARD QUESTION
Front
Mila mempunyai piring dengan panjang diameter alasnya 28 cm. Maka luas alas piring tersebut adalah …. cm².
Back
r = d : 2 maka r = 14 cm.
Luas lingkaran = phi x r x r
L = 22/7x 14 x 14
= 22 x 2 x 14
= 44 x 14
= 616 cm².
7.
FLASHCARD QUESTION
Front
Sebuah taman berbentuk lingkaran dengan panjang jari jari 21 meter dan akan ditanami rumput seluruh bagiannya. Apabila harga rumput Rp 8.000/m, maka biaya yang dibutuhkan untuk menanami rumput adalah ….
Back
Luas lingkaran = phi x r x r
L = 22/7 x 21 x 21
= 22 x 3 x 21
= 66 x 21
= 1.386 m²
Biaya = luas x harga per meter persegi
= 1.386 x 8.000
= 11.088.000
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