Page 33 - steps 3b.pdf

34
base 10 materials,
• Writing decimals . • • • • • • Adding decimals • • decimal abacus,
RM 95, calculator
~J~~]~~- IJ] Write in decimal form how much is coloured . Choose materials to help you with IJ] and [I] . ~J~~l~~~~
a ••• b®® OJ Add these decimals. b 2·6+0'7 c 4·8 + 1·7

a 0·3 + 1·3
h 5·7 + O·g
9 2 ·5 + 4·5
i 3·2 + 4·9
1111
clIl l1I jd Ire I1J d 2·8 + 4·2 e 6·9 + 1·7 f 3·3 + 6·6
Find at least 5 pairs of numbers which total 2·4.
111111 m Experiment on your calculator to find out
111111
what is miSSing on the blank keys. Write your answers .
3.13 I
a [j]c:JCiJ IIDD 0 iii ...--------.
tIl We'te the,e '0 decimal 'oem. •
a 2 units and 2 tenths b O·g and 3 units c 2·0 and ~ ,-, °1
d six tenths and 0 units e ~ and 1 unit f 2 units and 0 tenths bDDDII[gJc:J[[J1l .J.'J
w 0 2 3 cwl:J[IDIIDDDIl _ ..... 1:,]1
.' ! ! I I I! ! I I I. -'. '1
Write these decimals in order of size, smallest first.
d DDDII[[]8~1I
a 2·2 1·9 0·7 1·2 2.6
b 1·1 O·g 1·3 0·3 1.2
c 2·4 2·0 3·0 2·7 2.5
m Investigate. Use these keys [gJ ~ [.±] [§J
CHALLENGE as often as you like to go here:
a Fit these digits Iill II II into these frames I D D . D I c::J D II D c:J 0 iii a'4iJblb%~~
to make 6 different decimal numbers. Make the calculator display as
many different answers as you can.
b Then put the numbers in order of size, largest first.
Record your additions.
ma ISTEPS 3b:23! I STEPS 3b:23 1 m

rn 00 [!] Challenge rn 00
a,b 4.31
a 2.2 a 2.2 a 0.7 b 0.3 c 2.0 a 1.6 b 3.3 c 6.5 Open: finding at least 5 pairs of
b 1.q b >Vf,.,t 1.2 O.q 2.4 4.13 d 7.0 e 8.6 f q.q numbers which total 2.4.

c 2.5 c 2.5 1.q 1.1 2.5 3.41 g 7.0 h 6.6 i 8.1 ~
3.14
d i .3 d 0.6 2.2 1.2 2.7 Open: using keys 2, 3, 4, 5 to
1.43 [!]
e 3.0 e 1.7 2.6 1.3 3.0 complete
1.34 a 2.2 b 7.3 c 3.6 d 3.6
f 2.0 DDDGDDDEJ
in as many ways as possible and
record the results. (1/3 a,b,c)