“KEJAR/Kalkulator
Ekonomis Jari Tangan”
# Perkalian 11 -15.
Rumus :
100+B+(Bs*Bs).
Contoh : 13*11 =143
100+B+(Bs*Bs) =100(30+10)+(3*1)=143
# Perkalian 16 -20.
Rumus :
200+B+K1->Bs”
Contoh : 18*16=288
200+B+k1=200+(30+1O)+(8*6)=288
# Perkalian 21 -25 .
Rumus :
400+2B+(Bs*Bs).
Contoh : 23*21 =483
400+2B+(Bs*Bs)=400+2(30+10)+(3*1)=483
# Perkalian 26-30.
Rumus
:600+2b+(bs*bs)
Contoh
:28*26 =728.
600+2b+(bs*bs)=600+2(30+10)+(8*6)=728
# perkalian 31-35.
Rumus :
900+3b+(bs*bs).
Contoh
:33*31=1023.
900+3b+(bs*bs)=900+3(30+10)+(3*1)=1023
# perkalian 36-40.
Rumus :1200+3b+(bs*bs)
Contoh :38*36=1068.
1200+3b+(bs*bs)=1200+3(30+10)+(8*6)=1068.
# Perkalian 41-45.
Rumus :1600+4b(bs*bs).
Contoh
: 43*41=1763.
1600+4b+(bs*bs)=1600+4(30+10)+(3*1)=1763.
@ perkalian
46-50.
Rumus :2000+4b+(bs*bs)
Contoh :46*46=2116.
2000+4b+(bs*bs)=2000+4(10+10)+(6*6)=2116
selesai
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